Which of the following statements about thsf+5dy6( ht 4klzlx 9te effect of surface area and volume on the cell’s processes 4+tft5d ys6l9x(hl zkis false?

  Which statement best describdom opo8u48euhg*f f01cpa-: / jqw +bes stem cells?

  Which is a correct descriptiom(slb2n 0mgzqb5dv-dio8 ,8 an of the cell type adapted for gas exchange in the l50vmd8,8ldg2bm- (sn ozqa b iungs?

  Which of the following explains the-;+frigj 1xo m3u 7v1,9fma pygyxc 6u limitations on cell size?

  What is this cell's most likely pj8+im zf,wpoain0k h/qfa;7 9 -y5ytqrimary function, and where could it be located in a mamma7fiwa finqk;9qz/m8 jp 0ot,5y ahy -+l?

  Which of the following characteristics of type I pneumocytes contribute to isxg,e0 . ,txypncreasing the rate of gas exchange?,0y.g sext px,
I.
Cells are flattened
II.
Secretion of a surfactant
III.
Cover less than 10% of the alveolar surface

  A patient receives a bone marrow transplant from *- m.ng.;pylbmre jehh, + ai z7wq-7oa 36 year old. One of the functions of these cells is to produce red and white blood cells. What type of st -m l7m oqza+,ige*w. -;pyhnrjeb 7.hem cells has the patient received?

  Based on the Venn diagram, which identifies cardiac muscle cells and /.v+nx 7nt6q ut7fjm 9l mou-nhar-j*striated musamht. jf9rmno*tn+6xun/7-v7l j qu -cle fibres?

Below is a diagram of a m8 2d6:b.f5qbn rvuh 8 jgr*um;0iq.v cmfu9auotor neuron. Neurons are the longest cells in the human body.hbid*uu 8:mmu2f nv50q;.6 bc9q.vr jaf8gru
1.Explain the factors that limit cell size in humans.
2.Explain how life functions are performed by Paramecium.

Premature babies sometimes suffer from infant respiratoryffsde; i9 oe 60j(,eyd distress syndrome, which could be caused by a lack of sufficient surfactant in the p 6yes,efd( j;0doe if9ulmonary alveoli. The diagram below shows two different alveoli structures.


1.Describe one feature of the surfactant.

2.Suggest a treatment for infant respiratory distress syndrome.

3.Draw a labelled diagram of the structures in an alveolus that are important for gas exchange.

  Which of the following is a reason that embryonic stem cells are not used t*hj 1las sd7- )a qh)8s;uwkdin the treatmh 7a j8 ks-)d1qd*lhsasuw ;t)ent of leukaemia?

  The table shows the diameters of red blood cells from differentiyg1swhc/wt 1 7pi.: w organisms. Which red blood cell will have the highest surface area to volume ratis1cyiipww/wt:.1 7 hgo?

1.Explain how the shape o3qp2xtfpb4 .wf erythrocytes and cells lining the proximal convoluted tubule make thefp.w3q 42xtbpse cells more adapted to the functions they perform.

2.Compare and contrast the structure of striated muscle cells and cardiac muscle fibres.

3.Explain how the structure of egg and sperm cells are adapted to their functions.

  Which statements about embryonicak;9q481to3 m sw *t6jjpj4pcessr7 l stem cells and specialised cells is/are not true? 4ps9amte j*1kswjr 7q684cjtop 3l; s

I. Embryonic stem cells have higher levels of DNA methylation than differentiated cells
II. Specialised cells are more differentiated than embryonic stem cells
III. Most specialised cells and embryonic stem cells both contain the entire genome of an organism

  In humans, which of the following is the correct order from smallest to largestv1vk7g;o /0grfm 8qa q?oq0v1gm a87rq g/ fvk;

  Which row in the followqc6i 2xlijt bfn4o935ing table gives the correct disadvantages of the different stem cell sources for therap4foxtl23qi59 nji cb6eutic uses?

1.Describe how the use of stem cells may be used to treat type I diabetes i7c8bdvz6*s 6 c3iv5 jakhz -txn the fk8cv76 3vc 6- zbzi ajd5stx*huture.

2.Explain the factors that limit cell size in humans.

3.Explain how red blood cells and striated muscle fibres are adapted to their function.

Below are diagrams of specialised cells (not to scaliqubyzp:mv g 2/.(cl ;e).

1.Put these cells in order of size, from the smallest to the largest.

2.Compare and contrast totipotent, pluripotent and multipotent stem cells.